panic: assertwaitok: non-zero mutex count: 1 Stopped at db_enter+0x1c: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 357491 37929 0 0 0x4000000 1 syz-executor.3 db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff827c19a3) at panic+0x17b sys/kern/subr_prf.c:198 assertwaitok() at assertwaitok+0x132 sys/kern/subr_xxx.c:163 mi_switch() at mi_switch+0x46 sys/kern/sched_bsd.c:360 sleep_finish(0,1) at sleep_finish+0x19b sys/kern/kern_synch.c:414 rwsleep(fffffd80709914f0,ffffffff82c4a100,118,ffffffff827afd95,0) at rwsleep+0xab sys/kern/kern_synch.c:300 sosleep_nsec(fffffd80709913d0,fffffd80709914f0,118,ffffffff827afd95,ffffffffffffffff) at sosleep_nsec+0xff sys/kern/uipc_socket2.c:468 sblock(fffffd80709913d0,fffffd80709914a0,1) at sblock+0x1c4 sys/kern/uipc_socket2.c:514 soreceive(fffffd80709913d0,ffff8000374c7e28,ffff8000374c7de8,0,ffff8000374c7e20,ffff8000374c7fac,9eadea9861586d53) at soreceive+0x5fe sys/kern/uipc_socket.c:837 recvit(ffff80002a272d50,5,ffff8000374c7f80,0,ffff8000374c8060) at recvit+0x31b sys/kern/uipc_syscalls.c:1082 sys_recvmsg(ffff80002a272d50,ffff8000374c8010,ffff8000374c8060) at sys_recvmsg+0x138 sys/kern/uipc_syscalls.c:882 syscall(ffff8000374c80e0) at syscall+0x50f mi_syscall sys/sys/syscall_mi.h:103 [inline] syscall(ffff8000374c80e0) at syscall+0x50f sys/arch/amd64/amd64/trap.c:606 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x1a5fe2c1f20, count: 2 https://www.openbsd.org/ddb.html describes the minimum info required in bug reports. Insufficient info makes it difficult to find and fix bugs. ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic *cpu0: assertwaitok: non-zero mutex count: 1 ddb{0}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff827c19a3) at panic+0x17b sys/kern/subr_prf.c:198 assertwaitok() at assertwaitok+0x132 sys/kern/subr_xxx.c:163 mi_switch() at mi_switch+0x46 sys/kern/sched_bsd.c:360 sleep_finish(0,1) at sleep_finish+0x19b sys/kern/kern_synch.c:414 rwsleep(fffffd80709914f0,ffffffff82c4a100,118,ffffffff827afd95,0) at rwsleep+0xab sys/kern/kern_synch.c:300 sosleep_nsec(fffffd80709913d0,fffffd80709914f0,118,ffffffff827afd95,ffffffffffffffff) at sosleep_nsec+0xff sys/kern/uipc_socket2.c:468 sblock(fffffd80709913d0,fffffd80709914a0,1) at sblock+0x1c4 sys/kern/uipc_socket2.c:514 soreceive(fffffd80709913d0,ffff8000374c7e28,ffff8000374c7de8,0,ffff8000374c7e20,ffff8000374c7fac,9eadea9861586d53) at soreceive+0x5fe sys/kern/uipc_socket.c:837 recvit(ffff80002a272d50,5,ffff8000374c7f80,0,ffff8000374c8060) at recvit+0x31b sys/kern/uipc_syscalls.c:1082 sys_recvmsg(ffff80002a272d50,ffff8000374c8010,ffff8000374c8060) at sys_recvmsg+0x138 sys/kern/uipc_syscalls.c:882 syscall(ffff8000374c80e0) at syscall+0x50f mi_syscall sys/sys/syscall_mi.h:103 [inline] syscall(ffff8000374c80e0) at syscall+0x50f sys/arch/amd64/amd64/trap.c:606 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x1a5fe2c1f20, count: -13 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff8000374c7990 rbx 0xffffffff82bfbba7 cpu_info_full_primary+0x2ba7 rdx 0xffff800010fde480 rcx 0xffff80002a272d50 rax 0xffffffff82bfaff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x69fe4c944f11fc2 r11 0x2f647d23d05b98d7 r12 0xffffffff82bfb9a8 cpu_info_full_primary+0x29a8 r13 0 r14 0 r15 0x1 rip 0xffffffff822e738c db_enter+0x1c cs 0x8 rflags 0x246 rsp 0xffff8000374c7980 ss 0x10 db_enter+0x1c: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.3) tid=111678 pid=37929 tcnt=4 stat=sleep flags process=0 proc=4000080 runpri=24, usrpri=86, slppri=24, nice=20 wchan=0xfffffd80709914f0, wmesg=netlck, ps_single=0x0 forw=0x0, list=0xffff80002a2712c0,0xffff80002a1b1018 process=0xffff8000fffedd70 user=0xffff8000374c3000, vmspace=0xfffffd80753beaf8 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 24132 288237 77018 0 2 0 syz-executor.0 24132 301646 77018 0 2 0x4000000 syz-executor.0 33258 428814 37633 0 2 0 syz-executor.6 33258 433896 37633 0 2 0x4000000 syz-executor.6 78549 518587 97417 0 3 0x80 nanoslp syz-executor.1 78549 78397 97417 0 3 0x4000080 fsleep syz-executor.1 78549 219605 97417 0 3 0x4000080 fsleep syz-executor.1 60328 174614 38097 0 2 0 syz-executor.4 60328 252217 38097 0 3 0x4000080 fsleep syz-executor.4 60328 491000 38097 0 3 0x4000080 fsleep syz-executor.4 60328 260308 38097 0 3 0x4000080 fsleep syz-executor.4 37929 200380 93224 0 2 0 syz-executor.3 37929 357491 93224 0 7 0x4000000 syz-executor.3 *37929 111678 93224 0 3 0x4000080 netlck syz-executor.3 37929 103168 93224 0 2 0x4000000 syz-executor.3 84372 172586 83058 0 2 0 syz-executor.2 84372 358508 83058 0 3 0x4000080 netio syz-executor.2 93224 315155 45448 0 3 0x82 nanoslp syz-executor.3 83058 510827 45448 0 3 0x82 nanoslp syz-executor.2 37633 366844 45448 0 2 0x482 syz-executor.6 37279 507867 0 0 3 0x14200 acct acct 30046 1888 45448 0 2 0x2 syz-executor.7 38097 273809 45448 0 2 0x2 syz-executor.4 97417 11593 45448 0 3 0x82 nanoslp syz-executor.1 77018 222456 45448 0 3 0x82 nanoslp syz-executor.0 89292 317648 45448 0 2 0x2 syz-executor.5 27165 241682 1 0 3 0x100083 ttyin getty 76895 210772 0 0 3 0x14200 bored sosplice 45448 160799 97865 0 3 0x2000082 wait syz-fuzzer 45448 361843 97865 0 2 0x6000482 syz-fuzzer 45448 215205 97865 0 3 0x6000082 thrsleep syz-fuzzer 45448 173591 97865 0 3 0x6000082 wait syz-fuzzer 45448 512395 97865 0 3 0x6000082 wait syz-fuzzer 45448 200366 97865 0 3 0x6000082 thrsleep syz-fuzzer 45448 426374 97865 0 2 0x6000002 syz-fuzzer 45448 499206 97865 0 3 0x6000082 wait syz-fuzzer 45448 379624 97865 0 3 0x6000082 thrsleep syz-fuzzer 45448 440687 97865 0 3 0x6000082 wait syz-fuzzer 45448 463922 97865 0 3 0x6000082 thrsleep syz-fuzzer 45448 41670 97865 0 3 0x6000082 wait syz-fuzzer 45448 366651 97865 0 3 0x6000082 wait syz-fuzzer 45448 119528 97865 0 3 0x6000082 kqread syz-fuzzer 45448 98905 97865 0 3 0x6000082 thrsleep syz-fuzzer 45448 198544 97865 0 3 0x6000082 wait syz-fuzzer 97865 434928 82495 0 3 0x10008a sigsusp ksh 82495 164667 81370 0 3 0x9a kqread sshd 81370 463529 1 0 3 0x88 kqread sshd 42145 225267 67758 74 3 0x1100092 bpf pflogd 67758 65187 1 0 3 0x80 netio pflogd 38730 401215 39017 73 3 0x1100090 kqread syslogd 39017 183239 1 0 3 0x100082 netio syslogd 86126 279729 1 0 3 0x100080 kqread resolvd 72610 125644 59281 77 3 0x100092 kqread dhcpleased 22092 410242 59281 77 3 0x100092 kqread dhcpleased 59281 117965 1 0 3 0x80 kqread dhcpleased 5659 251437 0 0 3 0x14200 bored smr 30118 418616 0 0 2 0x14200 zerothread 12120 495935 0 0 3 0x14200 aiodoned aiodoned 54676 470583 0 0 3 0x14200 syncer update 55774 271641 0 0 3 0x14200 cleaner cleaner 1836 186242 0 0 3 0x14200 reaper reaper 55132 409727 0 0 3 0x14200 pgdaemon pagedaemon 55267 277552 0 0 3 0x14200 bored viomb 37772 362817 0 0 3 0x40014200 acpi0 acpi0 66090 64921 0 0 3 0x40014200 idle1 79241 474196 0 0 3 0x14200 bored softnet3 14914 245191 0 0 3 0x14200 bored softnet2 27040 280316 0 0 3 0x14200 bored softnet1 27780 394382 0 0 3 0x14200 bored softnet0 71951 342319 0 0 3 0x14200 bored systqmp 61096 138775 0 0 3 0x14200 bored systq 73417 182818 0 0 3 0x14200 tmoslp softclockmp 54996 1304 0 0 3 0x40014200 tmoslp softclock 36549 370082 0 0 3 0x40014200 idle0 1 68970 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive sched_lock &sched_lock r = 0 (0xffffffff82d3bdb0) #0 witness_lock+0x447 #1 sleep_finish+0x142 sys/kern/kern_synch.c:398 #2 rwsleep+0xab sys/kern/kern_synch.c:300 #3 sosleep_nsec+0xff sys/kern/uipc_socket2.c:468 #4 sblock+0x1c4 sys/kern/uipc_socket2.c:514 #5 soreceive+0x5fe sys/kern/uipc_socket.c:837 #6 recvit+0x31b sys/kern/uipc_syscalls.c:1082 #7 sys_recvmsg+0x138 sys/kern/uipc_syscalls.c:882 #8 syscall+0x50f mi_syscall sys/sys/syscall_mi.h:103 [inline] #8 syscall+0x50f sys/arch/amd64/amd64/trap.c:606 #9 Xsyscall+0x128 exclusive mutex &inp->inp_mtx r = 0 (0xfffffd8065e5a538) #0 witness_lock+0x447 #1 mtx_enter_try+0x104 #2 mtx_enter+0x4f sys/kern/kern_lock.c:266 #3 soreceive+0x5dc pru_lock sys/sys/protosw.h:288 [inline] #3 soreceive+0x5dc sys/kern/uipc_socket.c:911 #4 recvit+0x31b sys/kern/uipc_syscalls.c:1082 #5 sys_recvmsg+0x138 sys/kern/uipc_syscalls.c:882 #6 syscall+0x50f mi_syscall sys/sys/syscall_mi.h:103 [inline] #6 syscall+0x50f sys/arch/amd64/amd64/trap.c:606 #7 Xsyscall+0x128 Process 37929 (syz-executor.3) thread 0xffff80002a1b2d40 (357491) ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10215 6501K 7129K 166960K 29702 0 pcb 13 16K 18K 166960K 516 0 rtable 222 14K 15K 166960K 1828 0 pf 37 10K 11K 166960K 344 0 ifaddr 45 17K 17K 166960K 255 0 ifgroup 64 2K 2K 166960K 562 0 sysctl 4 1K 2K 166960K 16 0 counters 64 36K 36K 166960K 334 0 ioctlops 0 0K 4K 166960K 2015 0 iov 2 0K 20K 166960K 1164 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1441 90K 90K 166960K 7889 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 126 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 1627 0 dirhash 12 2K 2K 166960K 39 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 16 57K 85K 166960K 11893 0 sigio 0 0K 0K 166960K 121 0 proc 70 91K 128K 166960K 1617 0 subproc 104 6K 6K 166960K 364 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 414 0 in_multi 89 6K 7K 166960K 406 0 ether_multi 1 0K 0K 166960K 3 0 mrt 1 0K 0K 166960K 3 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 109 493K 493K 166960K 109 0 exec 0 0K 1K 166960K 1766 0 tdb 3 0K 0K 166960K 3 0 pagedep 1 8K 8K 166960K 1 0 inodedep 1 32K 32K 166960K 1 0 newblk 1 0K 0K 166960K 1 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 501 435K 438K 166960K 119276 0 UVM aobj 131 4K 4K 166960K 134 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 294 0 NDP 14 0K 2K 166960K 205 0 temp 74 5924K 6004K 166960K 88429 0 kqueue 14 22K 27K 166960K 859 0 SYN cache 2 16K 16K 166960K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 22 0 0 1 0 1 1 0 8 0 rtpcb 120 640 0 637 7 6 1 3 0 8 0 rtentry 112 574 0 473 5 2 3 4 0 8 0 unpcb 144 15897 0 15878 98 94 4 8 0 8 3 syncache 312 102 0 102 22 21 1 1 0 8 1 tcpqe 32 239 0 239 18 18 0 1 0 8 0 tcpcb 808 2608 0 2595 98 91 7 15 0 8 4 arp 120 134 0 118 1 0 1 1 0 8 0 ipq 40 5 0 5 2 2 0 1 0 8 0 ipqe 40 15 0 15 2 2 0 1 0 8 0 inpcb 368 6972 0 6951 134 127 7 14 0 8 4 nd6 136 91 0 70 1 0 1 1 0 8 0 pkpcb 40 25 0 25 6 6 0 1 0 8 0 kcovpl 48 28 0 20 1 0 1 1 0 8 0 ppxss 1256 34 0 34 12 11 1 1 0 8 1 pffrag 232 61 0 57 3 2 1 1 0 482 0 pffrnode 88 61 0 57 3 2 1 1 0 8 0 pffrent 40 364 0 360 3 2 1 1 0 8 0 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfstitem 24 336 0 318 1 0 1 1 0 8 0 pfstkey 128 336 0 318 1 0 1 1 0 8 0 pfstate 376 336 0 318 11 8 3 5 0 8 0 pfrule 1344 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 4 0 2 3 1 2 3 0 8 0 art_heap4 256 1742 0 1310 51 23 28 31 0 8 0 art_table 32 1746 0 1312 4 0 4 4 0 8 0 art_node 16 570 0 478 1 0 1 1 0 8 0 sysvmsgpl 40 6 0 2 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 1625 0 1615 1 0 1 1 0 8 0 shmpl 112 131 0 3 4 0 4 4 0 8 0 dirhash 1024 35 0 18 3 0 3 3 0 8 0 dino2pl 256 16738 0 15240 94 0 94 94 0 8 0 ffsino 272 16738 0 15240 101 0 101 101 0 8 0 nchpl 144 33886 0 33377 64 40 24 64 0 8 0 uvmvnodes 80 6088 0 0 125 0 125 125 0 8 0 vnodes 216 6088 0 0 339 0 339 339 0 8 0 namei 1024 108899 0 108899 8 7 1 2 0 8 1 percpumem 16 180 0 135 1 0 1 1 0 8 0 vcpupl 2048 176 0 0 22 0 22 22 0 8 0 vmpool 696 202 0 26 17 1 16 17 0 8 0 kstatmem 264 298 0 270 4 1 3 3 0 8 0 scxspl 216 106943 0 106943 29 28 1 8 1 8 1 plimitpl 152 1260 0 1244 1 0 1 1 0 8 0 sigapl 424 12246 0 12197 11 5 6 9 0 8 0 futexpl 64 97120 0 97115 3 2 1 1 0 8 0 knotepl 120 551 0 0 11 1 10 10 0 8 0 kqueuepl 216 4203 0 4193 82 79 3 7 0 8 2 pipepl 320 2495 0 2467 69 61 8 8 0 8 5 fdescpl 496 12163 0 12134 5 1 4 5 0 8 0 filepl 152 78694 0 78439 144 129 15 22 0 8 3 lockfpl 104 4973 0 4970 13 11 2 3 0 8 1 lockfspl 48 1596 0 1593 2 1 1 2 0 8 0 sessionpl 144 45 0 28 1 0 1 1 0 8 0 pgrppl 48 76 0 59 1 0 1 1 0 8 0 ucredpl 104 7310 0 7297 1 0 1 1 0 8 0 zombiepl 144 12197 0 12197 1 0 1 1 0 8 1 processpl 1072 12246 0 12197 5 0 5 5 0 8 0 procpl 680 33640 0 33565 14 6 8 9 0 8 0 srpgc 96 30 0 30 13 13 0 1 0 8 0 sosppl 168 154 0 148 12 11 1 1 0 8 0 sockpl 488 23543 0 23499 396 383 13 31 0 8 5 mcl64k 65536 33 0 0 5 2 3 3 0 8 0 mcl16k 16384 27 0 0 4 1 3 3 0 8 0 mcl12k 12288 28 0 0 2 0 2 2 0 8 0 mcl9k 9216 15 0 0 2 0 2 2 0 8 0 mcl8k 8192 33 0 0 3 0 3 3 0 8 0 mcl4k 4096 41 0 0 3 0 3 3 0 8 0 mcl2k2 2112 15 0 0 1 0 1 1 0 8 0 mcl2k 2048 367 0 0 33 17 16 33 0 8 1 mtagpl 96 744 0 0 12 0 12 12 0 8 0 mbufpl 256 1782 0 0 83 0 83 83 0 8 0 bufpl 288 23007 0 16683 453 1 452 453 0 8 0 anonpl 24 1288682 0 1273129 260 145 115 167 0 186 1 amapchunkpl 152 376720 0 375770 120 81 39 68 0 158 0 amappl16 200 25719 0 25198 152 124 28 40 0 8 0 amappl15 192 10 0 9 1 0 1 1 0 8 0 amappl14 184 226 0 211 2 1 1 2 0 8 0 amappl13 176 13 0 12 3 2 1 1 0 8 0 amappl12 168 13141 0 13109 3 1 2 2 0 8 0 amappl11 160 72 0 57 1 0 1 1 0 8 0 amappl10 152 63 0 50 1 0 1 1 0 8 0 amappl9 144 308 0 307 1 0 1 1 0 8 0 amappl8 136 626 0 490 5 0 5 5 0 8 0 amappl7 128 295 0 267 3 1 2 3 0 8 0 amappl6 120 702 0 682 1 0 1 1 0 8 0 amappl5 112 322 0 310 1 0 1 1 0 8 0 amappl4 104 785 0 747 6 4 2 2 0 8 0 amappl3 96 73591 0 73491 3 0 3 3 0 8 0 amappl2 88 13086 0 13008 4 2 2 4 0 8 0 amappl1 80 52397 0 51844 23 10 13 23 0 8 0 amappl 88 118208 0 117931 7 0 7 7 0 92 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 253 0 253 1 1 0 1 0 8 0 dma64 64 6 0 6 1 1 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 133 0 3 3 0 3 3 0 8 0 uaddrrnd 24 12365 0 12160 2 0 2 2 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 12365 0 12160 2 0 2 2 0 8 0 vmmpekpl 168 92239 0 92151 5 0 5 5 0 8 0 vmmpepl 168 732022 0 729297 348 208 140 147 0 357 11 vmsppl 464 12364 0 12160 27 1 26 26 0 8 0 rwobjpl 56 183854 0 175890 122 9 113 114 0 8 0 pdppl 4096 24738 0 24496 731 485 246 246 0 8 4 pvpl 32 3480853 0 3458627 611 416 195 339 0 265 0 pmappl 248 12364 0 12160 14 1 13 13 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1880 0 795 32 0 32 32 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff827c19a3) at panic+0x17b sys/kern/subr_prf.c:198 assertwaitok() at assertwaitok+0x132 sys/kern/subr_xxx.c:163 mi_switch() at mi_switch+0x46 sys/kern/sched_bsd.c:360 sleep_finish(0,1) at sleep_finish+0x19b sys/kern/kern_synch.c:414 rwsleep(fffffd80709914f0,ffffffff82c4a100,118,ffffffff827afd95,0) at rwsleep+0xab sys/kern/kern_synch.c:300 sosleep_nsec(fffffd80709913d0,fffffd80709914f0,118,ffffffff827afd95,ffffffffffffffff) at sosleep_nsec+0xff sys/kern/uipc_socket2.c:468 sblock(fffffd80709913d0,fffffd80709914a0,1) at sblock+0x1c4 sys/kern/uipc_socket2.c:514 soreceive(fffffd80709913d0,ffff8000374c7e28,ffff8000374c7de8,0,ffff8000374c7e20,ffff8000374c7fac,9eadea9861586d53) at soreceive+0x5fe sys/kern/uipc_socket.c:837 recvit(ffff80002a272d50,5,ffff8000374c7f80,0,ffff8000374c8060) at recvit+0x31b sys/kern/uipc_syscalls.c:1082 sys_recvmsg(ffff80002a272d50,ffff8000374c8010,ffff8000374c8060) at sys_recvmsg+0x138 sys/kern/uipc_syscalls.c:882 syscall(ffff8000374c80e0) at syscall+0x50f mi_syscall sys/sys/syscall_mi.h:103 [inline] syscall(ffff8000374c80e0) at syscall+0x50f sys/arch/amd64/amd64/trap.c:606 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x1a5fe2c1f20, count: -13 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp x86_ipi_db(ffff800029d2bff0) at x86_ipi_db+0x1e sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0xf sys/dev/kcov.c:154 wakeup_n(fffffd80709914f0,ffffffff) at wakeup_n+0x37 sys/kern/kern_synch.c:541 soreceive(fffffd80709913d0,ffff80003766f508,ffff80003766f4c8,0,0,ffff80003766f68c,9eadea9861586d53) at soreceive+0x1857 pru_unlock sys/sys/protosw.h:294 [inline] soreceive(fffffd80709913d0,ffff80003766f508,ffff80003766f4c8,0,0,ffff80003766f68c,9eadea9861586d53) at soreceive+0x1857 sys/kern/uipc_socket.c:1194 recvit(ffff80002a1b2d40,5,ffff80003766f660,0,ffff80003766f658) at recvit+0x31b sys/kern/uipc_syscalls.c:1082 sys_recvmmsg(ffff80002a1b2d40,ffff80003766f760,ffff80003766f7b0) at sys_recvmmsg+0x320 sys/kern/uipc_syscalls.c:973 syscall(ffff80003766f830) at syscall+0x50f mi_syscall sys/sys/syscall_mi.h:103 [inline] syscall(ffff80003766f830) at syscall+0x50f sys/arch/amd64/amd64/trap.c:606 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x1a55c1ddd50, count: 5 ddb{1}> trace x86_ipi_db(ffff800029d2bff0) at x86_ipi_db+0x1e sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0xf sys/dev/kcov.c:154 wakeup_n(fffffd80709914f0,ffffffff) at wakeup_n+0x37 sys/kern/kern_synch.c:541 soreceive(fffffd80709913d0,ffff80003766f508,ffff80003766f4c8,0,0,ffff80003766f68c,9eadea9861586d53) at soreceive+0x1857 pru_unlock sys/sys/protosw.h:294 [inline] soreceive(fffffd80709913d0,ffff80003766f508,ffff80003766f4c8,0,0,ffff80003766f68c,9eadea9861586d53) at soreceive+0x1857 sys/kern/uipc_socket.c:1194 recvit(ffff80002a1b2d40,5,ffff80003766f660,0,ffff80003766f658) at recvit+0x31b sys/kern/uipc_syscalls.c:1082 sys_recvmmsg(ffff80002a1b2d40,ffff80003766f760,ffff80003766f7b0) at sys_recvmmsg+0x320 sys/kern/uipc_syscalls.c:973 syscall(ffff80003766f830) at syscall+0x50f mi_syscall sys/sys/syscall_mi.h:103 [inline] syscall(ffff80003766f830) at syscall+0x50f sys/arch/amd64/amd64/trap.c:606 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x1a55c1ddd50, count: -10